Aircraft Designs Horizon

Unlock the legendary “Pultec Magic” with modern precision and vintage warmth.

Inspired by the iconic 1970s Pultec EQP-1R, the Horizon Discrete Program Equalizer delivers silky highs and thick, rich lows with authentic analog character—reimagined for today’s pro audio workflows. Built with discrete components and a custom “flying” gyrator circuit replacing traditional inductors, this EQ offers crystal-clear high-frequency boosts with zero hum and ultra-low self-noise.

Whether you’re performing live, mixing creatively, or mastering with transparency, Horizon adds musical tone and warmth that breathes life into every track.

Key Features

• Unique Gyrator Circuitry for clear, musical high-frequency boosts without self-noise.

• Stereo/Mono operation with left input normaled to right.

• Independent High Frequency shelf attenuation (0 to -16 dB) and peak boost (0 to +15 dB).

• Independent Low Frequency shelf attenuation (0 to -17.5 dB) and peak boost (0 to +13.5 dB).

• Gain make-up stage for level balancing and harmonic saturation.

• Q Bandwidth control (10–15 dB) to fine-tune the width of the high frequency boost.

• Bypass switch to compare processed and clean signals.

• Level metering for precise output control.

• Compatible with modular and line-level signals.

Technical Specifications

• High Frequency Shelf Attenuation: 0 to -16 dB

• High Frequency Peak Boost: 0 to +15 dB

• Low Frequency Shelf Attenuation: 0 to -17.5 dB

• Low Frequency Peak Boost: 0 to +13.5 dB

• Q Bandwidth Control Range: 10–15 dB

• Input Compatibility: Modular-level and line-level signals

• Operation Mode: Stereo/Mono with left input normaled to right

• Bypass: True bypass switch

• Level Metering: LED output level display

• Dimensions: 18 HP, 50 mm deep

• Current Draw: 210 mA @ +12V, 130 mA @ -12V, 0 mA @ 5V

Applications

• Add vintage Pultec-style warmth and clarity to tracks or mixes.

• Perfect for live sound engineers seeking classic analog tone with modern reliability.

• Creative mixing tool for precise high and low frequency shaping with minimal noise.

• Transparent mastering EQ to add character without losing detail.

• Ideal for modular synth users requiring flexible line-level EQ with authentic analog sound.